Just thought you guys would like to see the insides of my Crown XTI-2000 power amp. The amp puts out 475 watts per channel into 8 ohms. I am very impressed with the sound quality of this amp driving my new Polk LSI25's. The low end is solid, tight, and powerful. The highs and mids are superb! A steal at $699.00.
Crown XTI-2000 Power Amp
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dmusgrave
HPM Fan, No Apologies!
That is some serious wattage! :thmbsp:
Yes, the 23lb Yamaha MX-D1 (500wpc class D amp) looks much the same. Except the MX-D1 doesn't need all those heat sinks or a fan.Switch mode power supply. Note the very small transfomer for that much power - not implying at all that's a bad thing, only that it's a big difference from old school "heavy metal".
jhal
Titanium Bliss
Thanks for sharing. I have wondered what those new Crowns look like inside. Being an "old school" guy, it has taken a long time to convince me that these "beef-less" amps can produce mig-welding power, but I am realizing that this type of amp is very capable, and the design solves many of the problems of big amps, especially in touring sound systems: power consumption and back-breaking weight.
Very nice amp.:thmbsp:
Very nice amp.:thmbsp:
70salesguy
Only 99 easy payments!
As a hard line old fart, I still like the big transformer, the large heat sinks and the heavy-duty power transistors.
Fortunately, my DC300A series II, Power Line Four and PS-400 meet the bill! :yes:
Fortunately, my DC300A series II, Power Line Four and PS-400 meet the bill! :yes:
Use to own a DC-300. Great Amp! Still using my IC-150 pre-amp from the day. Still working fine even the pilot light is original!
jhal
Titanium Bliss
Anyone else notice the heatsink design? Looks like the transistors are installed, then a second "helper" sink is locked in position over the transistors and their primary heatsink. I wonder if thermal compound is used or does it just rely on the friction-fit being tight enough to transfer heat away. :scratch2: Are those TO3's for the switching power supply or output stage? I notice there's another vertical heatsink running front to rear that looks like it may have TO-3P's on it. I guess these must be the P/S switchers? I am just trying to figure out the layout of this thing.
SWL3600
Super Member
I have four of the 2000's and one 1000. I have been very satisfied so far with these amps and at (I think) 17lbs each they are light as a feather!!
So can someone tell me what the difference in performance is gonna be from large, heavy heat sinks/transformers vs. the XTI switching style? I've read that it makes no difference........just would like more opinions/info here.
So can someone tell me what the difference in performance is gonna be from large, heavy heat sinks/transformers vs. the XTI switching style? I've read that it makes no difference........just would like more opinions/info here.
jhal
Titanium Bliss
There should be no difference in performance between the two types as long as they are properly designed. It's just preference. Some people, like myself, are stubborn in a way to accept new designs. It's kind of like automotive engines- i.e., big-block v-8 vs. turbocharged v-6. As long as the horsepower and, more importantly, the torque are the same, it shouldn't matter.
JesusChrysler
...drives a Dodge ; )
Mmm.
But I like the SOUND of a big-block V-8 over a turbo'ed 6......
Matt
But I like the SOUND of a big-block V-8 over a turbo'ed 6......
Matt
Mmm.
But I like the SOUND of a big-block V-8 over a turbo'ed 6......
Matt
Is there anybody that doesn't? The little high strung motors with the 4" pipes they have in the cars nowadays sound to me like souped up vacuum cleaners.
VintInfinity
Tactophonic
A properly done turbo V-6 can sound very nice too.
2009 Nissan GT-R is a fine example. Jump to 0:50s, 2:20, 2:50 for wind-up and down, and 3:40ish.
http://youtube.com/watch?v=dsbfE4RDVgY
2009 Nissan GT-R is a fine example. Jump to 0:50s, 2:20, 2:50 for wind-up and down, and 3:40ish.
http://youtube.com/watch?v=dsbfE4RDVgY
70salesguy
Only 99 easy payments!
There are a lot of new cars with smaller engines that will run faster than my 66 GTO, but I like the way the GTO sounds much better! :yes:
FalconEddy
Audio Mastering Engineer
So can someone tell me what the difference in performance is gonna be from large, heavy heat sinks/transformers vs. the XTI switching style? I've read that it makes no difference........just would like more opinions/info here.
Well, these Crown designed Class-I amps are pretty ingenious.
They took all the good things from the Class-D (pulse width modulation) design, and improved it by making it operated in an interleaved fashion. That's basically a couple of switching outputs running in a parallel time-balanced configuration (separately, but together) for the positive and negative sides of the 'waveform' (switch pulses). So, as the positive side increases, the negative side decreases proportionately; and visa versa. Both sides of the pulse width are always center aligned. Very cool technology.
When the amp is at idle (no signal) the signal's pulse width is the same on both sides and appears to be interleaved. Hence the name Class-I.
. . Falcon
I have a car magazine that did a shootout with the new GTO and a factory stock 67 GTO.
The new GTO out did the 67 in every category (not by much though mind you) except one.
Curb appeal... you take both GTOs to a parking lot and guess which one the people will flock to.
Scott
70salesguy
Only 99 easy payments!
I have a car magazine that did a shootout with the new GTO and a factory stock 67 GTO.
The new GTO out did the 67 in every category (not by much though mind you) except one.
Curb appeal... you take both GTOs to a parking lot and guess which one the people will flock to.
Scott
Yes, the recently deceased "new" GTO had a LS-2 good for 400 hp.
No doubt it will ourun, outhandle and outstop my 66.
But there's nothing quite like hearing that Carter AFB 4-barrel open up and those 335 old-style ponies from that 389 roar out the dual exhaust.
2006 was the last year for the "new" GTO. I thought about buying a 2006 to pair up with my 66 - 40 years of "evolution". Haven't totally ruled it out if I found a good deal on a "lightly used" one.
Of course, that would mean getting rid of my 95 Thunderbird. Garage space considerations, of course.